Yazar "Aldirmaz, E." seçeneğine göre listele

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  • Küçük Resim
    Öğe
    Effects of thermal treatments on mechanical properties of Cu-24.2%Mn alloy
    (Natl Inst Optoelectronics, 2012) Aldirmaz, E.; Celik, H.; Tekelioglu, A.; Aksoy, I.
    In this work, some physical and mechanical properties of Cu-24.2%Mn (wt %) alloy have been investigated by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and compression deformation test. Austenite phase has been obtained in the samples by applying slowly cooling and rapidly cooling processes according to the SEM analysis. It has been observed that the grain size obtained by the rapidly cooling is smaller than the grain size obtained by the slowly cooling. Therefore, it has been concluded that the cooling process differences change the grain size of the alloy. Compression stress has been applied to the alloy in order to research the deformation effect on the austenite phase. Slip lines and martensite structure were observed on the surface of the alloys after the deformation. In the present work, shows that, in the slowly cooling and deformation provide not in effects of diriving forces on martensitic transformation, but the rapidly cooling and deformed sample was observed gamma(1)' (2H) martensite.
  • Küçük Resim
    Öğe
    Investigation of deformation and microstructure of bainite in Cu-9.97%Al-4.62%mn alloy
    (Technical Faculty, Bor-Serbia, 2014) Aldirmaz, E.; Aksoy, I.
    In this study, some physical and mechanical properties in Cu-9.97%Al-4.62%Mn (wt%) alloy were investigated by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and compression deformation test. Bainite phase were obtained in the samples according to SEM and XRD analyses. Compression stress was applied on the alloy in order to investigate the deformation effect on the bainite phase transformation. On the surface of the Cu-9.97%Al-4.62%Mn alloy after the deformation, both bainite and martensite variants formed.
  • Küçük Resim
    Öğe
    SEM and X-Ray Diffraction Studies on Microstructures in Cu-26.04%Zn-4.01%Al Alloy
    (Polish Acad Sciences Inst Physics, 2013) Aldirmaz, E.; Celik, H.; Aksoy, I.
    Due to fact that Cu-based alloys are very sensitive to the thermal treatments, in scanning electron microscopy and X-ray diffraction observations, according to the different quenching techniques Cu-26.04%Zn-4.01%Al alloys can display different product phases such as martensite and precipitation. Rapidly cooling sample was formed as M18R structure from the ordered DO3 phase and in the monoclinic case, beta = 89.1 degrees determined for sample. It was seen that a a-precipitation (fcc) phase in the matrix is slowly cooling.